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INSTALLATION MANUAL
8. AIR PURGUE
SAFETY PRECAUTIONS
ATTENTION
• Use a vacuum pump with a gauge reading less than -0.1 MPa and an air discharge capacity greater than 40 L/min.
• The outdoor unit does not need a vacuum pump. DO NOT open the gas and liquid shut-off valve of the outdoor unit.
• Make sure the vacuum gauge reading is -0.1 MPa or less after 2 hours. If after three hours of operation, the
gauge reading is still above -0.1 MPa, check whether there is a gas or water leak inside the pipe. If there
are no leaks, perform another extraction for 1 or 2 hours.
• DO NOT use refrigerant gas for system extraction.
REMOVAL INSTRUCTIONS
Before using manifold pressure gauges and a vacuum pump, read their operating manuals to make sure you
know how to use them correctly.
Compound gauge
Pressure gauge
-76cmHg
Low pressure valve
Charge hose
Low pressure valve
Flare nut
Valve body
Valve stem
Fig. 9.3
62
1. Connect the charging hose of the manifold gauges to the
2. Connect the manifold gauge charging hose from the ma-
3. Open the low pressure zone of the manifold gauges. Keep
High pressure valve
4. Turn on the vacuum pump to remove the system.
Charge hose
5. Extract air to create a vacuum for at least 15 minutes or
Vacuum pump
6. Close the low pressure valve on the manifold gauges and
7. Wait 5 minutes and then check that there has been no
8. Insert a hex wrench into the relief valve (high pressure
9. Observe the pressure gauge for one minute to make sure
10.Remove the charging hose from the service port.
11. Using a hex wrench, fully open the high and low pressure
Cap
OPEN VALVE STEMS CAREFULLY
When opening the valve stems, turn the hex wrench until
it contacts the stop. DO NOT try to force the valve to open
further.
12. Tighten the valve caps by hand and then tighten with the
13. If the outdoor unit uses all vacuum valves and the vacuum
service port of the low pressure valve of the outdoor unit.
nifold gauges to the vacuum pump.
the high pressure zone closed.
until the vacuum gauge reads 76 cmHG (-1x105Pa).
turn off the vacuum pump.
change in system pressure.
valve) and open the valve by turning the wrench 1/4 coun-
terclockwise. Listen as the gas is expelled from the sys-
tem and then close the valve after 5 seconds.
there are no changes in pressure, its reading should be
slightly higher than atmospheric pressure.
valves.
appropriate tool.
position is on the main valve, the system is not connected
to the indoor unit. The valve must be tightened with a
screw nut. To prevent leaks, check for gas leaks before
operation.
SPLIT 1X1
AROMA 2E
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